{
  "manageEntity": {
    "action": "Save",
    "entityId": "9748064",
    "entityType": "Track",
    "nonce": "0x426c95d3836e892b33f24b846fa75ad9d9be4079b601d95b14db5db55cbc5847",
    "signature": "0x9d17ee409c28b1af0e88264595abbff2e45686ae71e4fabf747d6075b835a5ed3589bd1eb59940e33e3a0007760504d82114222b4000821606ff8dbb38dff01e1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}