{
  "manageEntity": {
    "action": "Save",
    "entityId": "1424678971",
    "entityType": "Track",
    "nonce": "0x7d676a2cb047e5b42b46d49f7a26df4aaa6966178ebeb10ce6d040b53a998665",
    "signature": "0x7fbf63bc2a44c00a8b941c84208e66a38a61482aa28b5e3fe37c1dac018b452f32103558130500db68b46391bdc775fad22d2296ca811f9b2b9f467efeded9441c",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}