{
  "manageEntity": {
    "action": "Save",
    "entityId": "629883987",
    "entityType": "Track",
    "nonce": "0xaa89a3dfbff3a3c62ae9ebf00bbcbb812ec564ae2259c8cd581295f616291272",
    "signature": "0xd987c80c4b23a69ae2cff2d6f136c4bb195495e204474e823298436ab5f0bcda64d658e9232c209ff2fa49c1b9a108b3fe5461f935bd8d5856c3cad42eb4004c1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}