{
  "manageEntity": {
    "action": "Save",
    "entityId": "1242311783",
    "entityType": "Track",
    "nonce": "0x4e0c6c761b1e58796c04107215edecf1f27b7b2d2b7a1fa2627df0c879e6091f",
    "signature": "0xf5fc9a176889c387c3b1585e1ed9089f70f745912c528275d0b6a67d5fc40ac20485978fe8257090dc0dd74902ad49e80fc4cf22314f0f3ad1ce4a712c1602b71c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}