{
  "manageEntity": {
    "action": "Save",
    "entityId": "894954034",
    "entityType": "Track",
    "nonce": "0xd04397015eca99dce3d7a816cf17420bb0c9098cd65cbe57c0638b7710813295",
    "signature": "0x96caeb1b3e5ae3979ecc7c9ff349042924d134d68b5f88102a3b768139c7ec84755b1475b6ac84e245212016bcf627c829cf30c375e869a5a4afef2b308f655a1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}