{
  "manageEntity": {
    "action": "Save",
    "entityId": "823729033",
    "entityType": "Track",
    "nonce": "0x5362dd0dc50b997da89e303ef8c48e317fb8b1bf9deada712a903a3caf17e4cf",
    "signature": "0x6d70c0009632f2093558306f3a271844cfcb95a3423a1bf06d208389959cb1e10cd2ed84324a9d075f90a794968e32f67a6473cc9a8e753d6506e8c9a734c4d31c",
    "signer": "0x97eAfE883FbF33a8b75f6f37440caFE5CC452d3f",
    "userId": "849776474"
  }
}