{
  "manageEntity": {
    "action": "Save",
    "entityId": "1209747234",
    "entityType": "Track",
    "nonce": "0xb93bd6e0276f86414948cab578af3889698826e3604de394d77963275ae1d060",
    "signature": "0xc7c0e9543597974507e2d55198285524fc55c5bf11cd4fba08f38238b6c9d65d3d6c7b88d0c2fee90056337f263e76cdcf1fe5779880afcddccfb7c74c7013471b",
    "signer": "0xb6B208a8f79b1D88d245afa5aDB0a40d38cd6DD1",
    "userId": "528688046"
  }
}