{
  "manageEntity": {
    "action": "Save",
    "entityId": "608168216",
    "entityType": "Track",
    "nonce": "0xe26648df1dc97b5848c0164e4b3abd6cbed83949ce63045e7a64a648cd86ac04",
    "signature": "0xf390d7db844ddf43041a382e695eeb8456ea464c65351bc8fe9fee05d44fe9cf05ef9ad90af87d9a1b4b7c6d1458438e9dc74789384099f28c490306bd436af11c",
    "signer": "0x79375D6d575fE2a038916001077f90CbAE12d4A9",
    "userId": "973873678"
  }
}