{
  "manageEntity": {
    "action": "Save",
    "entityId": "1200826333",
    "entityType": "Track",
    "nonce": "0xa2d7b319cb5b4c0ef6fac5a9710e15661cc617396c7755d2660f60838cf4415d",
    "signature": "0xb8adf1db43baf6d573bc7047d0bd5e2f74618d8054a58233a92c1fd93cadd1a77926097d4278ae6fe91fa4f8ae3d8ecdec9adef4bf13136f21a9896d14bc012c1c",
    "signer": "0x0168976438910D2f5330323a0d0141Fb4Af95032",
    "userId": "317847"
  }
}