{
  "manageEntity": {
    "action": "Save",
    "entityId": "1370737217",
    "entityType": "Track",
    "nonce": "0x1d96dfa4d72c385631fdf7135ce568d6c8538d1f77ecf85cbe8e62015230f01b",
    "signature": "0xc120aab5b266dd23db7db26cdb1e4dcfae8688a9c61bc4e9d349f676f6bbef12495e7a5f2a3ac9be36774c90a133dd8dcac5f4acbe3dc452b2928a1d0262409f1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}