{
  "manageEntity": {
    "action": "Save",
    "entityId": "736138425",
    "entityType": "Track",
    "nonce": "0x75cf39445181b51643b74b2b56a638248dfd4f28dbf3c165e0aa49c01812593d",
    "signature": "0xa139d2e5f7f1c8f4712503a64c75e1fb47c67bf8ac226d5175d78b84a27c917a75096eb57923e8b35b4f405f8ec12695534b7fcfddc875174ff84567799c31761b",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}