{
  "manageEntity": {
    "action": "Save",
    "entityId": "480729853",
    "entityType": "Track",
    "nonce": "0xd59f88d2d74f5fc293ec444c240f0b0f72d54b3cf800c34e1065e8bc1d3407a4",
    "signature": "0x7619bf6d9057fef3aa32e50b971493c16dfa462570176a15e23b1085a1c07df55108b3efb83f499ff17386386e71a8b9be5e292f49687b027c445552dd0f85f71c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}