{
  "manageEntity": {
    "action": "Save",
    "entityId": "37632212",
    "entityType": "Track",
    "nonce": "0xb52885a153d84fca3b5ae1ce7adc4668594dcba128df6438e661787c21a6ea2f",
    "signature": "0x2352e4a7f00981eb3683b4fedd939395d32c3173399dc0c24bfe3e4c908113535c5817c4a3ce1ca480eda84a1b4721f4598144c9372594ff020d557cd18804841b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}