{
  "manageEntity": {
    "action": "Save",
    "entityId": "1954055249",
    "entityType": "Track",
    "nonce": "0x20137c143d461bfbd6e1e66374540eb8285ec6f94404c56821fdb2432787a6ac",
    "signature": "0xa2f1731f2f1852c346d6677ced5aee6a3eed46e76b09282364781287c3685bd80835b338782d00759f9ce5c278f63691c67fc90b3d263674850e69ac5a7ee0711c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}