{
  "manageEntity": {
    "action": "Save",
    "entityId": "631676903",
    "entityType": "Track",
    "nonce": "0xb1fdcfcd8d908181860a859bf37837ddeb3613b1b05939f59e6b992c45416dee",
    "signature": "0x8d4cab8e2d70178e141eaa2e0fe90a8a71216e2f745f87d8e5ca13dca08cc8b64c203493edd6307d510aefdae5396c24f744107ef763c1a11b8c5a45ea22d5a71b",
    "signer": "0x7Cd44Dc53B13eEA7335A000Ce36c05cDFE34b348",
    "userId": "355113"
  }
}