{
  "manageEntity": {
    "action": "Save",
    "entityId": "1699488338",
    "entityType": "Track",
    "nonce": "0x79763f515d60898704805568e09a7bf7626677e6ae72c45e4b6a41dedbc4162c",
    "signature": "0xe3926572644c712ad12db16a11659b3d8529c58bf0cc8d0f9203aa50bb6cdde51583ad482bedb903f4c3a40cec3ea1e48d514c3de0f17742c7f0252f48a442241c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}