{
  "manageEntity": {
    "action": "Save",
    "entityId": "603018",
    "entityType": "Track",
    "nonce": "0x27785d18c3363679b0c82b54c95b714861eb46e6584abf689f60426cee23c99d",
    "signature": "0xd59bf927ab2e007164bff3d40002e544218bc477531cc2ce03230986fe99ea5f40b0bed145ebca725b83733e55ce7e8ff667aa5483dcfe98e6e24723970f33581c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}