{
  "manageEntity": {
    "action": "Save",
    "entityId": "59366654",
    "entityType": "Track",
    "nonce": "0xf50f11c47bdf7ca84dad22443ab1f5d0bd7d9d990d90e1c3017e0af9cd30ef14",
    "signature": "0x89fb055d62c9cdf58e69f257129cd4b49275d16d307ffaf24ea478735623df6607b9cf2c26f4ca049aeea6ef660f2ee755077a2626bd6bb1b77e4920055c4bcb1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}