{
  "manageEntity": {
    "action": "Save",
    "entityId": "1319799161",
    "entityType": "Track",
    "nonce": "0xeda5b925a3a9ce296b94e6c0f04da42c5639e46f289e847a18c74a97446cf132",
    "signature": "0x6a30dcc4f0507da95c1b460aa6a592ae62ce3b70f7257d619d3a8df257363df84e017ac184be65230b84881b5f19a39cf52e388be9cf2536b0e5e93804023f731c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}