{
  "manageEntity": {
    "action": "Save",
    "entityId": "368235",
    "entityType": "Track",
    "nonce": "0xd87f3dfa5ece3e5e1bf94d267fefe72d37890a1c9acdb31347f07c2e9674f3af",
    "signature": "0x1de841a49e1173e733acfee3b554dedfa990e69a717a817d7b320fe48b25ec3748d7c71504e9ec56a3a68d4dd91842c5ce43909d5d93837d70cc04c46fe8aede1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}