{
  "manageEntity": {
    "action": "Save",
    "entityId": "1517045345",
    "entityType": "Track",
    "nonce": "0x0500399a37c5e15bc9269be6cd8fc5118ffd8ff6df312866cb0b0173d0fbb11a",
    "signature": "0xaa494631de9394543e9a74c535184df6c04e00402fd480355653a53f47af5e43208331a386dbb7db03a89bb2dff3d95b16ab8b9d0c2f6db585e9f0d1d79741e71b",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}