{
  "manageEntity": {
    "action": "Save",
    "entityId": "2067070999",
    "entityType": "Track",
    "nonce": "0x1c9818fe8cd28721933816c8c8e3c5f727c1f5f934b1e4eba008795ff80440e4",
    "signature": "0x0a1b00c63750e497aaeaf7fe6d1f093b2e0e181831ff3ecb4d5f9dcec77213bd516b65b7a0b023a398e52bd344cff92233a18a7987eb6b48335b0aa6620657241c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}