{
  "manageEntity": {
    "action": "Save",
    "entityId": "1289389094",
    "entityType": "Track",
    "nonce": "0xf0b4d97456224e0d76c27c87b39989cb372626c7a8a9846f3009a4935499c6e2",
    "signature": "0x75c9fdbc3272edbded66a37685892038271980121b1a2859993aa9a171b95deb7702c7a369ad8268fac505670320bdcd71317960762e8f4fc36a47d48d63a0b71c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}