{
  "manageEntity": {
    "action": "Save",
    "entityId": "75313201",
    "entityType": "Track",
    "nonce": "0x24e93775b3911afcdf5d259613ca3f1bdd04301a5540cfb403d037ca7fbd0e20",
    "signature": "0x998eb4eea5bcfc80cde0571bb7e532ed17e8343435c7433e0ed3c751f4aa88060667bbb23a93d506a71f340f94f73aafec03378d65499d7042f430f7db2f09281b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}