{
  "manageEntity": {
    "action": "Save",
    "entityId": "984745",
    "entityType": "Track",
    "nonce": "0x21759d35401d57e06e91f6d8e6646a1c7748967d67883106b0be6a9277683699",
    "signature": "0xc5f60d01f35f87eb3c3dfb566d6bc117a00afbb18b3f646f2c304f86d8b36c704cd4972c202ce5070dd1c78687d728ef69b3966acae1a79471ae5e35718532ff1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}