{
  "manageEntity": {
    "action": "Save",
    "entityId": "2074426987",
    "entityType": "Track",
    "nonce": "0x703b0e3bc528907d44f625a4ffcdc30eca604bd9138cd3aa241500e3870a262b",
    "signature": "0xc302699476429ecc896e8511768aeab76d02e1565099b99c67271b459e0b818937fbeb508bf00f92e74afb3e2b3641c41a1cdd37e4ab44582d6ccb1812b205291c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}