{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015984",
    "entityType": "Track",
    "nonce": "0x23434829dad2e27692a70d3233dc960ca50ceeef09b1bb2e3d338e1be9bb6704",
    "signature": "0x0df0e05dfceeb10b8e51711fe5f3233892d4f01ac91b491c41f33fa88075147528a727827474ce3533976b2fbdfd10c5e4c3be03fa6275cebdd88141c18b0c7b1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}