{
  "manageEntity": {
    "action": "Save",
    "entityId": "1279997044",
    "entityType": "Track",
    "nonce": "0x13ccda26bcaa15515bf7c16e91061b091f5ff257e9806883c909704933abb7f9",
    "signature": "0x48e6c05a19ce009c0625da4957824e53101c25a2c9e9241d29bf7ceceb7481b922e907958d0692d58ca30ebca682ac1ce33a6d552a81e7cfd090e7cc6f7b03261c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}