{
  "manageEntity": {
    "action": "Save",
    "entityId": "634612577",
    "entityType": "Track",
    "nonce": "0xbd999b8b38f7c6acc69c449a3ae827146b64312d27f5337b0451fe04bc31d706",
    "signature": "0xfbc5104c566cfcac1177f741b17b96b0d741bbbdd4c4c360e91c903b4489265f754ec9d51d0500cb66be2436c242830d5d4467e657879615be316eb0cd9c4a5a1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}