{
  "manageEntity": {
    "action": "Save",
    "entityId": "2146913703",
    "entityType": "Track",
    "nonce": "0x9ed3ccda6fcd75cebaf7c0889bea5b16ea716330d01ee619904768d19ddf0607",
    "signature": "0x4454e2fff01195bddba09f354aba5bc7ab3fbea0f826f5be6c21106a193587d937b3507e49c0bd5400ee5af98c718e7b33919ec6872cc9213c79fa6242f77ed31b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}