{
  "manageEntity": {
    "action": "Save",
    "entityId": "1009039255",
    "entityType": "Track",
    "nonce": "0x6272d57ae9c73b6b34566a04dd17eaaa977890e397d8300b88baad950998814b",
    "signature": "0xe0770421f4165da2aa182b9c7dfa2b2fefa61128f0f425a0a25e2663b201059765782a4aa4acee6f2bdcd49d6ddeff4fe85117cb1df8373b69715072cf0e78e11c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}