{
  "manageEntity": {
    "action": "Save",
    "entityId": "1935729229",
    "entityType": "Track",
    "nonce": "0x9d13b90e53bac2522c4e1079396b09f455c6bb829d967a66181308801ea18ca0",
    "signature": "0xba5fcc2c67bfdd9664086909f30338b8f47bdbd8b534af6cc7fcd58f601d895a6133a25dd3d26e50b380f9244722cf8db1a18a45df46cbdbbaa70f4745b3ca821b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}