{
  "manageEntity": {
    "action": "Save",
    "entityId": "368031237",
    "entityType": "Track",
    "nonce": "0xdc080561d5ad380b71489f5f5862aafe2e000d3d58191408584eec36a23f5486",
    "signature": "0x21d3df08c691dd5c6c4439a2e161da130d435daad433e29d55e3fc2fba8750d9526247a0e364fbcdef68e9c6a9224588c290854dd9265db567b55ddccabb35a11c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}