{
  "manageEntity": {
    "action": "Save",
    "entityId": "7482956",
    "entityType": "Track",
    "nonce": "0x81443a96f48205c110d859528c9edc88d5c47c406fed34cca280cc1afcf568ce",
    "signature": "0xb0fe72ce31f63324f536911de0a0aeff80a913878a792f6e2d527b22f7d4f15c535b4acc18c5ddccfa17e8e4df633bdd7b0477594c792623750d03ec2fa8ec031c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}