{
  "manageEntity": {
    "action": "Save",
    "entityId": "1557074258",
    "entityType": "Track",
    "nonce": "0x3eda576d0ade5ad0ea1c4519f6f297777ea374f2df6b1b9c969294dec0933f57",
    "signature": "0x9a01bbf2b7d23e4e65496149b59ba4f13a187b43f2f98c93e59bc78cc3d48d850d067deb2b07df758e4ff37584a6b6bc743b90a6edf1fa972b09cdb1549b5a371c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}