{
  "manageEntity": {
    "action": "Save",
    "entityId": "1708128965",
    "entityType": "Track",
    "nonce": "0x913e47228620cff90e2c2cc16c88b81ce7e6ff74abf77f684c4a4f1d7d287f32",
    "signature": "0x0ebc9314b68c5d5b05814d74644e9e80ca7583fff046bc8614aa4c848b8eaca106faa4f7ce472fbb30e1b6e3b9a1d0dfb1a3268240445061e8f3d0750e17b8111b",
    "signer": "0xb51B50C9b7d88C66d31539161F4BA9Dd72a17dF5",
    "userId": "465531556"
  }
}