{
  "manageEntity": {
    "action": "Save",
    "entityId": "1585783697",
    "entityType": "Track",
    "nonce": "0xb49912090de5aa35c072a95ff95e7da346ad25c8e409c991bc6c35998cc71b05",
    "signature": "0xcda7a8303402184cdd0befac422bd36b88ec7530c109cb55dd0a02a3344cea915c67642b8f8da9538b0a8d5dfa132e1bfecb91cff20bce5a2b78450c7f2f21901c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}