{
  "manageEntity": {
    "action": "Save",
    "entityId": "1499337064",
    "entityType": "Track",
    "nonce": "0x707754873b567c2129dbb135d6ba6323638440334373fcc08c104f1c77dc0bdf",
    "signature": "0x401377dc73e492beb208e97f9a14c241b3c7d7d7278ce3df8fea120a1fc6c44d099f0f3e21274a6e7c170d301ef95a5343cddec556fd5edda4841e58b96bdefd1b",
    "signer": "0x2ACda02e37Db2DC08f82aEFAB268F0610974bb3c",
    "userId": "416239376"
  }
}