{
  "manageEntity": {
    "action": "Save",
    "entityId": "779301606",
    "entityType": "Track",
    "nonce": "0xd3d11a6bea1610d91226740cbf13cefaeba327e7ab076ed77d191a9753e7fc92",
    "signature": "0xfe65e46b8f2b5d8d876d471d44d9b19f9e715d8613073b2a3831d18653b287a3059a8ea18426c8521b5ee569e07d3a407a5dfdd709711a1aa0fa78580edc16641c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}