{
  "manageEntity": {
    "action": "Save",
    "entityId": "624062",
    "entityType": "Track",
    "nonce": "0xb1c6703ae3c15a13b6e2743a8d33d48ce19f01d72dcba631797acc2f05e63588",
    "signature": "0x2f7101b76e7e10e12b534f16a53b6b64c1f5792ee0d341ed2ec9e486be997fb42b1ca98bf8abf17bbc1dd3c4f7265a3b0adcecf1337157f23e884083fbd4f6091c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}