{
  "manageEntity": {
    "action": "Save",
    "entityId": "1891854292",
    "entityType": "Track",
    "nonce": "1790343484302065530",
    "signature": "0x36acf8c417238e19c6e596e26c1cfcf1c34bc62ecb49845d2708a557f95f666403db98b3b0180f240aeaadaccdd695b79267fddc4ab581f772e15068c3dc724e1b",
    "signer": "0x23dF8876fD80368D375d911e3CbDFd15B8e85CB5",
    "userId": "827420993"
  }
}