{
  "manageEntity": {
    "action": "Save",
    "entityId": "831101",
    "entityType": "Track",
    "nonce": "0xa320d7fb476e814e1662791b682f50e63bba7c91d0376272c0f760f75e031edd",
    "signature": "0x721696a8f57b2cdd48d1c2933d3aaf6ca03acd07b77037c9b928e80853aa8bfc71f8bd4fad3ac96663b74493838946d080a7d477075e716cc590b24297f49f4f1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}