{
  "manageEntity": {
    "action": "Save",
    "entityId": "1166976618",
    "entityType": "Track",
    "nonce": "0xc7a5134ccaa51e5e79af58154a9fadbb72164c635a4fed2b5942b90cbdf12e1a",
    "signature": "0x433eb0fe00438f3a101b5b0966880da864c3ed4607129fb0232fe208f352bda73220f8c6c7b6715c224fcfed996e13d476f15279085ff520ca5f54954475fdb41c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}