{
  "manageEntity": {
    "action": "Save",
    "entityId": "636368",
    "entityType": "Track",
    "nonce": "0xe5836946053c0f494e309aaf7576bcbcdd319d792e36337ed28a4fde7b71a8a2",
    "signature": "0x4c103a911a9838010baa2b1cc07f076186d16d32be67c6cd3b0f90252bf003397434add903487bfbe18e833cd9b0a8fdd44c057a7bc4636a0ab25db94f6e86f91b",
    "signer": "0x8E12224e4dDc1BdfeC3d5Bf01DB7e4Ec17403ABa",
    "userId": "627040654"
  }
}