{
  "manageEntity": {
    "action": "Save",
    "entityId": "953167628",
    "entityType": "Track",
    "nonce": "0x2eacb9049a42926f66d476ececda78b9e214f22e36535fd3b680212f1c62be03",
    "signature": "0x82f6b64c50933156fdbd99dfb11b6281daacdbcc51c66a3a47a13e04fc3e9f04662e74fb2ccb9dab04a8a9c26016d4f054fe08bf9aaed2aed3f1eac45d0209021b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}