{
  "manageEntity": {
    "action": "Save",
    "entityId": "555937434",
    "entityType": "Track",
    "nonce": "0xf525005c36f3e4e3f7c5d70c8e8916c6c12b014c6b884b1a166d2b50e08a7b86",
    "signature": "0x194b15995c9129e7b748c72d93e65c39dc46553e0c65b299f4e90e3f5e36baf80be8f949dc59f3524ed5277b6f8115412a8bd06d7fae8e4695d999d44adacbc11c",
    "signer": "0x4086Dda2D91F77cd46De0859a4de37F888508faA",
    "userId": "568518925"
  }
}