{
  "manageEntity": {
    "action": "Save",
    "entityId": "989008",
    "entityType": "Track",
    "nonce": "0xa29bc1c87fc448f9c1bacf108b27827f5d991f8d3d5263b38c8a086293a6dcbe",
    "signature": "0x23aac738518afd87f4ac9cc37e5fd1c0b421109f4cbff5b9d49c90c729aa1e281292304fea1ef6986eab67ebe52d5969c16868c6aaef4c556c945acd515e7a8a1b",
    "signer": "0x15B9643abE09bd37C52a5BD1dCF938B05b06cBFB",
    "userId": "370091516"
  }
}