{
  "manageEntity": {
    "action": "Save",
    "entityId": "1203573967",
    "entityType": "Track",
    "nonce": "0xc361ab3efb248ae1dafb42be6318a3667d4667a1a2c26f970dc66ecdb4844f97",
    "signature": "0x4493e269bd9c69ff7650bc7efa3bc17a437fec3edf121a457f4607e404a6c69037df45bfc7ea69a12a1d3c72792e7dbc99b9fca9d3671599379e8d611f1565f01c",
    "signer": "0x76433fcfc10E04743aB4EB98660d4B47526AD243",
    "userId": "328228955"
  }
}