{
  "manageEntity": {
    "action": "Save",
    "entityId": "846698184",
    "entityType": "Track",
    "nonce": "0x3a7fb3c9dee425a8b2f2c9699dfad88d3bc61f31e0251a7a6fcbbb30f53b3caa",
    "signature": "0xde1191134de621a81dc1df64b0f6d3d2778cef145047a356cb2e71a8c96d08b97f6d7f4f6b08ae28a69d54bfa5abcc4da39de4d276c74c5ad916cf677eb7baa81c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}