{
  "manageEntity": {
    "action": "Save",
    "entityId": "962999223",
    "entityType": "Track",
    "nonce": "0xa5daf6625ae65a3df6bd35eab505909746425a88f5a38f01fd9a54b75f6f0cd1",
    "signature": "0x0b45928dace487f744e6528af4f495fc0a4f2bfd699d9a34f398ab5d5a65393f7ab865c83e929a2c0e47d2faccbe646163131d30abe8a8611c6703f90e8fb7db1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}