{
  "manageEntity": {
    "action": "Save",
    "entityId": "1322570346",
    "entityType": "Track",
    "nonce": "0x7626a14dcc879c0f9d76b9208ec648ac1881196965ca051307a9c9e49c07d312",
    "signature": "0x7fc14f95684d89b1bc18827b2d8cff07cebd23a3c49720eb59a61c8707889dc30bbbdc0bcab8b3c1241820c49b8740e97fb80df669bd2ba77c87c801cd9f1c0f1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}