{
  "manageEntity": {
    "action": "Save",
    "entityId": "501436210",
    "entityType": "Track",
    "nonce": "0xabe817e85a361498ff3491353eff6b7467014a3f4029ad30a7dc4276f0b6f8e7",
    "signature": "0xaeb3adf2907759432a4d21335a022382f69fa2b7144a6d2166e454f1b0e380d221c95f9c183f16f74293b9f7a647c10da670707aabb0dadb07e58a6a2d674a1e1b",
    "signer": "0xb205e691f66c34ECeeDe1b57Af02073564c2F8a7",
    "userId": "24712149"
  }
}