{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807130179",
    "entityType": "Track",
    "nonce": "0xb3c8bbcf7713d4affe3f62eb6e0b18fa7062a8bb5c32618ed337ed2ff6556ecf",
    "signature": "0xab8a766b6064fb473819a58fded9ded1f176930d55802c6601fe9919662c3bf36cbf5e689a4fd638ea775bdc58b061dc65ad9f19e1ca09f8e7c57380c7be09181c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}