{
  "manageEntity": {
    "action": "Save",
    "entityId": "53981176",
    "entityType": "Track",
    "nonce": "0xa1ed21876e91b64d8f20e244d9ac1f213d3b7ef425fe9e4c9a493276322412a3",
    "signature": "0xe8b1a1bbbac4a105096205c837b103590988ba856bb62d932ee9c7cec67988e27e5bd3f7eadc5f4fa2745bfbbb7588f736c7b48977988b7f159e3b71e8511adb1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}