{
  "manageEntity": {
    "action": "Save",
    "entityId": "2008284543",
    "entityType": "Track",
    "nonce": "0x9b760b1aea9f93e640e023ecd377dd6fb8a8ef104ac10295489ff82789765c0d",
    "signature": "0xc5063455541941d039ce777eb99914b3a30b4cd9c0731bcccf072ea0659398a41925966324e9fa047567b6eb218611cdf3f12786088da061eef985f4311e56a91b",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}