{
  "manageEntity": {
    "action": "Save",
    "entityId": "1525061946",
    "entityType": "Track",
    "nonce": "0xa775fd216d696a14ca87a2b271fdf8e0dfc8e1f97d4badab9808e6f0a85364ac",
    "signature": "0x665ecd8abef5fa0e320b88f69acf709bb2184f82ab3e0c213e5c6b9578af00ce19204f919ce98bcfdc4ea8b3c09334984dea191a033af500e09aa3b96b2b0bbb1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}