{
  "manageEntity": {
    "action": "Save",
    "entityId": "1961349529",
    "entityType": "Track",
    "nonce": "0xbf9e3677557680de57b0206299df703b3a82282b5bc66d97de54b1eb5188388f",
    "signature": "0xe5a9160f05a907b0440c80172dc00c25865d5a6c5d5a210d8d86cb02d9451ea206c154556080689950a99a4d4fba9469faec03d2b11cfcb3c243b08e34911e4c1b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}