{
  "manageEntity": {
    "action": "Save",
    "entityId": "145039613",
    "entityType": "Track",
    "nonce": "0xe9791c100a4b7226565540f920fee53ae7d44b70b834b62e5d8d72bee6a9d60e",
    "signature": "0x0b1b5b9e23cee45fc82b03130390c7c7d55176648b1d0074eeb7f8cab6b47ea07b470820471d5fe50b46cd05028a237c422acbcabfedcb1bf5eb4293822a2ece1c",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}